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R77

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ID = 16248
       
Country:
France
Brand: Dario (tubes) - voir aussi La Radiotechnique
Tube type:  Triode, vacuum   Power/Output 
Identical to R77
Similar Tubes
Normally replaceable-slightly different:
  B405
First year 1928 Saga of the Vacuumtube, Tyne page 403

Base Europe 4-Pin (A, 4A, B4, since 1914) (Codex=Eo)
Filament Vf 4 Volts / If 0.15 Ampere / Direct / Battery =
Literature Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   
 
r77darioebayph1.jpg
R77: Ebay
Patrice Zeissloff

 
r77_so.png
R77: rtt
Michael Schlör

 
r77dariodatasmall.png
R77: own collection
Peter den Boer


Usage in Models 1= 1928?? ; 4= 1929

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):5

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